摘要
就y·=-∑4i=1αixi-(∑2i=0αixi)y,x·=y类方程的中心焦点判定,给出了2个判定定理.通过直接计算,可简化对此类系统的中心焦点的判定.
This paper seeks the method to determine the central focus of a type of equation systems such as y·=-∑4i=1α_ix^i-(∑2i=0α_ix^i)y,x·=y, by two theorems. Thus the determination of the central focus of these systems can be simplized through direct calculation.
出处
《辽宁师范大学学报(自然科学版)》
CAS
北大核心
2005年第2期158-160,共3页
Journal of Liaoning Normal University:Natural Science Edition
基金
吉林省科技发展计划项目(200305163)